Safety appliance for fluid-conduits.



J. PERRY'.

SAFETY APPLIANCE FOR FLUID CONDUTS. APPLICATION FILED 0m10.191s

1,296,213, Patented Mar. 4,1919.

Hurrah sra'rns PATENT critica.

JAMES PERRY, OF SOMERVILLE, IDIIASSACIIUSETLS.`

SAFETY APPLIANCE FOR FLUID-CONDUITS.

Specication of Letters Patent.

Patented Mar. 4, 1919.

Application filed October 10, 1918. Serial No. 257,543.

expensive device adapted to automatically y shut off the supply of fluidwhen any material fluctuation in the pressure of said fluid takes place.Another object of the invention is to provide means for utilizing thepressure of fluid to reopen the conduit for the passage of the Huidtherethrough..

The invention consists in the combination and arrangement of parts set`forth in the following, specification and particularly pointed out iiithe claims. f

Referring to the drawings:

Figure l is a plan view of an appliance embodying my inventionillustrating the top of the casing thereof removed and a portion of saidcasing sho-wn in section.

Fig. 2 is a vertical section.partly in elevation taken on the line 2-2of Fig. 1.

Likev numerals refer to like parts in both views of the drawings.

In the drawings, 1 represents a casing of any suitable shape orvconstruction havin a discharge tube 2 connected therewith pre erabl atone end. A valve 3 is connected with sai tube 2 preferably upon theinterior of said casing and is adapted to control the discharge of fluidfrom said casing through said discharge tube. Numerous types of valvesmay be employed in this connection but for convenience a valve is shownhaving a passage 4 extending therethrough and connecting with the,interior of the discharge tube 2.

A tapered plug 5 isl arranged to seat in a correspondingly taperedrecess ,6, said plug being movable relatively Vto said seat to open orclose the passage 4 of said valve.

A lever 7 is pivotedwithin said casing, in lthe present instance vbymeans of center screws 8 and 9 secured to the side walls of said casingand engagingopposite ends ofv a shaft 10 constituting a portion of saidlever.

This lever is operativ y connected at one end 11 with said plug 5 andits pivotal move- Vments cause said valve plug 5 to be moved from one ofits positions to the other.

The free end portion 12 of said lever 7 which is the operating endthereof, is longer than the portion which engages said plug for` thepurpose of multiplying, by increase leverage, the power exerted againstsaid free end to rocksaid lever. Attached to the free end of saidleveris a pocket-like member'13 consisting of a substantially horizontalpor-l tion 14 and a substantially vertical portionl 15 connectedtogether and extending trans-- versely of said casingi kThe normal.position of the lever 7 will be as illustrated by its full lineposition Fig. 2. The weight of said valve plug upon said lever beingsufficient to maintain said lever in this position and when in such aposition the valve 3 will be closed, preventing any discharge of fluidfrom the casing. The casing 1 is also provided with a fluid supply tube16 preferably connected with said casing at the end thereof, oppositethe discharge tube 2.

The supply tube 16 protrudes into said casing and has at its inner end anozzle prefv erably consisting of a cap 17 provided with a dischargeorifice 18 directed downwardly, and at an angle to the bottom of saidcasing. This nozzle is adapted to dischargel a jet of fluid into saidcasing 1 beneath the end of the lever 7 bearing said pocket-like member13 and has no effect upon said lever when the same is in its full lineposition.

The supply tube 16 has a shut-ofi' valve 19 connected therewith outsideof the casing 1 by means of which the supply of fluid to the casing maybe shut olf. The lever 7 and valve plug 5 will remain in their closedpositions yuntil some additional agency is employed to rock said leverabout its axis from the full line position thereof to the position shownin the dotted lines in said Fig. 2. When such a movement of said levertakes place the valve 3 will be opened and the Vfluid or gas containedwithin the ,casing 1 orifice 18 of said nozzle, said jet being ireturnsaid lever to Lits normal position.

Should the pressure or force ofthe jet iluctuate suiliciently to allow''the weight of the plug 5 to overcome the. pressure of said jet `uponsaid lever said lever will return to its normal position andthere remain.until the same is again depressed. Numerous -devices may be employedfor depressing said lever 7 vThe .preferred means however, consists ofan auxiliary tube 20 connected-with the :main supply tube 16 in advanceof the valve 19 .as shown at 21. IThe tube 2O also hasa shut-ofilvalve22 arranged therein-outside of the casing-1. `Beyond the valvef22,

A said tubefpasses through the wall of .said

casing to the. interior thereof where it is provided with a nozzlepreferably consistmg .of-a .cap.23 secured over its .inner end :anczhavinga discharge orifice`24c adapted to di- ;rect a .jetol` lluid intothe ,angle of the pocket formed bythe `members .Hand 15 when said leveris in its uppermost-,or fully line position.

VA cap @25,is attached to the to Vof the casing `1 preferably by screws26 t us Aproviding access to the interior of the casing to adjust or.repair the operating partsvvof .the device. IThe operation oftheappliance hereinbefore specifically described isas fol- .Assuming thelever to be in its normal posit-ioI-nas sho-wn in full.linesFig..2, andthe valve closed, also the valves19 Aand 22 closed, .the valve. 22 isvfirst `opened permitting fluid to pass fromy the supply -tube Vthroughthe tube-22 into the casing 1 Idischarging intosaid casing through thedischarge Aorifice 24E. When the force of the jet of fluid,.dischargedthrough said orifice,

has Vbecome-strong enoughl to rock thelever 7 from the full lineposition to the dotted Vline `,position of F ig. y2 thevplug 5 will belifted and ,saidv valve opened permitting gas or ilfuid Y to dischargeinto the .discharge tube 2.

After said lever' has been moved to said dotted -line position the-valve 19 must be ropened anda jet offluid discharged through theorifice v18 .against .the end of saidlever which willhmaintain saidllever in its de- .pressed` position as long 4as the pressure of saidjetremains strong enough to overcome the weight of the plug 5 which it willdo under ordinary conditions. Any material fluctuation, however, in thepressure of fluid from Asaid supply tube will allow vsaid-lever 7 tofbemoved back from .its .normal position the weight. of -saidplu-gandconsequently the discharge of fluid from the casing* will Lbe 'cutoify by the closing vof the valve.

As soon as the pressure of fluid from the Fd'ischafrge orifice hasbe'come strong enough to maintain saidlever in its depressed positionthe l'valve22 Ashould be closed so that Y"the said lever 7 will ybeacted upon solely `bythe-jet from the oriice 18. :11n yorder tube,lalever operatively connected atsone end with saidvalve and having-attits popposite :end a lpocket lthe weight 'of .said valve being normally4Aadaptedto '-.mamtainisaid valve closedmeans yfor moving :said'levertoopen .said valve. and ansecondlflui'd-Stube adapted todirect-iluifdinto said -po'cketto maintain saidvalveopen.

.2. Adevice Vof lthe class described.- having vin combination, aluidtube, a .valve-adapt ed'to control theuvpassage sofffluid Athroughsaid tube, a fluid*.supplypipa-.andischarge nozzle .therefor, .aleveroperatively. .connect- `ed withsaid valve .andj' provided :.vvith .apocket, fthe vweight `of .said valve'being normally adapted,to-.maintain -sai'dgpoeketiout ofl thenrangeof .the rfluid dischargedfrom said nozzle, and. means for moving said lever to open said `valveand .place said pocket within the range of said. nozzle. Y

3. jAdevice .ofthe class Adescribed having in combination, `avflu-id,discharge gtube, a

susV

valve. adapted vto control thedischargefof Y .flu-id through isaiddischarge Vtube, 1a `fluid Asupply fpipe, \a .discharge-.nozzletherefor, a

llever operatively Yconnected with. said valve and provided with. ya`.nockeuathe lweight zof ,said- .valve being normally adapted to.4mai-n- .tai n saidwpocket out of jthe frange of the Huid discharged from.said` nozzle, ...means Y forfmoving saidlever to open said valve andplace saidv pocket riii-.thefrange-of .said .nozzle and meansforlautomatical-lyY moving said valve -to-r its inoperativeposition.

4. A device .of the. classdescribed having in combination,;a Huid tube,,avalveadapted' to Acontrol the Apassageof fluidY through fsaid daube,alfluid supply `ipipe, adischargenozzle therefor, aleveroperatlvely-connected with said valve and .provided with ,-apocket, fthe.weight of said valve beingnormallyyadapted l.to maintain said pocket.out of the .range-fof the uid discharged from said nozzle and anauxiliary fluid supply pipe adapted to discharge iuid into said pocketwhen said lever is'in its normal position, whereby said lever may beoperated to open said valve.

5. A devi-ce of the class described having in combination, a fluid tube,a valve adapted to control the passage of fluid through said tube, afluid supply pipe, a discharge nozzle therefor, a lever operativelyconnected with said valve and provided with a pocket, the weight of saidvalve being normally adapted to maintain said pocket out of the range ofthe fluid discharged from said nozzle, an auxiliary fluid supply pipeadapted to direct a jet of fluid into said pocket when said lever is inits normal position and means for regulating the passage of fluidthrough said auxiliary pipe.

6. A device of the class described having in combination, a fluid tube,a valve adapted to control the passage of uid through said tube, a Huidsupply pipe, a discharge nozzle therefor, a lever operatively connectedwith said valve and provided with a pocket, the weight of said valvebeing normally adapted to maintain said pocket out of the range of theiuid discharged from said nozzle, a valve adapted to regulate thepassage of fluid through said auxiliary pipe, and a spring to yieldinglymaintain said valve closed.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JAMES PERRY.

Witnesses CHARLES S. GooniNG, SYDNEY E. TAET.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

